What is the tree of life?
The tree of life shows how all life on earth is related. Each leaf represents a different species. The branches show how these many species evolved from common ancestors over billions of years. In our interactive tree of life you can explore the relationships between 2,235,322 species and wonder at 105,289 images on a single zoomable page.
- 2,235,322 species
- 105,289 images
Biodiversity and Conservation...
We want to help everyone appreciate biodiversity and the need to conserve it.
Red leaves on our tree of life show species known to be under threat of extinction.
Green leaves are either okay for now but might be nearly threatened.
Most leaves are grey meaning that it's not known how threatened they are.
What they say...
The best tool I’ve seen for exploring the tree of life on this planet.
Magnificent piece of software, brilliantly intuitive visualisation of the tree of life
I love the OneZoom tool - really easy to use and the visualization is great. I've just shared it with my 13 year old, who is a science geek - he loved it and is still playing with it!
The best interactive tree of life ever!
One of the coolest things I've seen on the internet
I often use OneZoom in my class, the students love it.
Wonderful idea and resource!
OneZoom really helps get my mind around the complexities of the tree of life.
OneZoom is probably my favorite website of all time.
…simply the most useful tool for understanding phylogenetic and evolutionary relationships.
Become a sponsor...
OneZoom is a registered non-profit in the UK, all our products are available for free. 480 people like you have helped us by making donations. Their names appear as sponsors on 795 leaves of our tree of life.
Only one name per leaf so get your favourite while you can, for yourself or as a gift.
What we've been up to...
16 October 2020
OneZoom version 3.4.1 released with new public APIs providing information on the popularity of species and representative images for groups of species as well as other tools intentended for use by researchers and other science communication projects.
15 October 2020
A new publication, Dynamic visualisation of million-tip trees: the OneZoom project, is now live on BioRxiv describing a lot of the research that's gone on behind the scenes over the last five years to make OneZoom a reality.
30 April 2020
Thank you to the first people who supported us with sponsorship four years ago. Your sponsored leaves would normally be up for renewal right now. We've decided to extend your sponsorships for free so you don't have to worry about it at this difficult time during a global pandemic. We will write to all our sponsors giving plenty of notice when it's time to renew.
26 April 2020
Version 3.4 of OneZoom is launched with a new landing page and enhanced content across the whole site. We now have more prominent features for learning about biodiversity, taking conservation action, using screenshots and deploying an exhibit at public venues.